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Experiment: Separation of Acidic and Neutral Substances OH OCH, ОН ÓCH, 2-Naphthol mp 123°C, pK, 9.5 1,4-Dimethoxybenzene (Hydroquinone dimethyl ether) mp 57°C Benzoic acid mp 123°C, pK, 4.17 1) Dissolve 3g of the mixture (equal proportions of benzoic acid, 2- naphthol, and 1,4-dimethoxybenzene) in 30 mL of ether and transfer the mixture to a 125-mL separatory funnel . Add 10 mL of water. 2) Add 10 mL of a 3 M aqueous solution of sodium bicarbonate to the funnel. Swirl the mixture to allow carbon dioxide to escape. Stopper the funnel, and cautiously mixture the contents. Vent the liberated carbon dioxide and then shake the mixture thoroughly with frequent venting of the funnel. Repeat the process with another 10 mL of bicarbonate FIG. 3 solution. Allow the layer to separate completely, then draw off the holding a separatory funnel lower layer into a 50 mL flask (flask 1). Correct positions for when shaking.

Experiment: Separation of Acidic and Neutral Substances OH OCH, ОН ÓCH, 2-Naphthol mp 123°C, pK, 9.5 1,4-Dimethoxybenzene (Hydroquinone dimethyl ether) mp 57°C Benzoic acid mp 123°C, pK, 4.17 1) Dissolve 3g of the mixture (equal proportions of benzoic acid, 2- naphthol, and 1,4-dimethoxybenzene) in 30 mL of ether and transfer the mixture to a 125-mL separatory funnel . Add 10 mL of water. 2) Add 10 mL of a 3 M aqueous solution of sodium bicarbonate to the funnel. Swirl the mixture to allow carbon dioxide to escape. Stopper the funnel, and cautiously mixture the contents. Vent the liberated carbon dioxide and then shake the mixture thoroughly with frequent venting of the funnel. Repeat the process with another 10 mL of bicarbonate FIG. 3 solution. Allow the layer to separate completely, then draw off the holding a separatory funnel lower layer into a 50 mL flask (flask 1). Correct positions for when shaking.

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Please create a flow chart for this experiment. ( the images are steps 1 through five, the steps 6-9 are in the description below.) Steps 6-9: —> Cautiously add concentrated hydrochloric acid dropwise to Flask 1 until the contents are acidic to litmus and then cool the flask in ice. 7) Decant the ether from Flask 3 into a tared flask, taking care to leave all of the drying agent behind. Wash the drying agent with additional ether to ensure complete transfer of the product. If decantation is difficult then remove the drying agent by gravity filtration. Put a boiling stick in the flask, and evaporate the ether in the hood. 8) Isolate the compound in Flask 2 by vacuum filtration on a Hirsch funnel, and wash it on the filter with a small quantity of ice water. 9) Isolate, weight the product in Flask 1 by suction filtration.
3) Add 10 mL of 1.5 M aqueous sodium hydroxide to the séparatory funnel, shake the mixture thoroughly, allow the layers to separate, and draw off the lower layer into a 50 mL Erlenmeyer flask (flask 2). Repeat the process with another 10 mL of base. Then add an additional 5 mL of water to the separatory funnel, shake the mixture as before, and add this to Flask 2. 4) Add 15 mL of a saturated aqueous solution of sodium chloride tó the separatory funnel, shake the mixture thoroughly allow the layers to separate, and draw off the lower layer, which can be discarded. Carefully pour the ether layer into a 50 mL flask (flask 3) from the top of the separatory fünnel, taking great care not allow any water droplets to be transferred. Add about 4 g of calcium chloride pelléts to the ether extract, and set it aside. 5) Acidify the contents of Flask 2 by dropwise addition of concentrated hydrochloric_acid while testing with litmus paper. Cool the flask in an ice bath. FIG. 4 Separatory funnel with Teflon stopcock.
Transcribed Image Text:3) Add 10 mL of 1.5 M aqueous sodium hydroxide to the séparatory funnel, shake the mixture thoroughly, allow the layers to separate, and draw off the lower layer into a 50 mL Erlenmeyer flask (flask 2). Repeat the process with another 10 mL of base. Then add an additional 5 mL of water to the separatory funnel, shake the mixture as before, and add this to Flask 2. 4) Add 15 mL of a saturated aqueous solution of sodium chloride tó the separatory funnel, shake the mixture thoroughly allow the layers to separate, and draw off the lower layer, which can be discarded. Carefully pour the ether layer into a 50 mL flask (flask 3) from the top of the separatory fünnel, taking great care not allow any water droplets to be transferred. Add about 4 g of calcium chloride pelléts to the ether extract, and set it aside. 5) Acidify the contents of Flask 2 by dropwise addition of concentrated hydrochloric_acid while testing with litmus paper. Cool the flask in an ice bath. FIG. 4 Separatory funnel with Teflon stopcock.
Experiment: Separation of Acidic and Neutral Substances OCH, ОН OCH, 2-Naphthol mp 123°C, рК. 9.5 1,4-Dimethoxybenzene (Hydroquinone dimethyl ether) mp 57°C Benzoic acid mp 123°C, рК, 4.17 1) Dissolve 3g of the mixture (equal proportions of benzoic acid, 2- naphthol, and 1,4-dimethoxybenzene) in 30 mL of ether and transfer the mixture to a 125-mL separatory funnel . Add 10 mL of water. 2) Add 10 mL of a 3 M aqueous solution of sodium bicarbonate to the funnel. Swirl the mixture to allow carbon dioxide to escape. Stopper the funnel, and cautiously mixture the contents. Vent the liberated carbon dioxide and then shake the mixture thoroughly with frequent venting of the funnel. Repeat the process with another 10 mL of bicarbonate solution. Allow the layer to separate completely, then draw off the lower layer into a 50 mL flask (flask 1). Correct positions for holding a separatory funnel when shaking. FIG. 3
Transcribed Image Text:Experiment: Separation of Acidic and Neutral Substances OCH, ОН OCH, 2-Naphthol mp 123°C, рК. 9.5 1,4-Dimethoxybenzene (Hydroquinone dimethyl ether) mp 57°C Benzoic acid mp 123°C, рК, 4.17 1) Dissolve 3g of the mixture (equal proportions of benzoic acid, 2- naphthol, and 1,4-dimethoxybenzene) in 30 mL of ether and transfer the mixture to a 125-mL separatory funnel . Add 10 mL of water. 2) Add 10 mL of a 3 M aqueous solution of sodium bicarbonate to the funnel. Swirl the mixture to allow carbon dioxide to escape. Stopper the funnel, and cautiously mixture the contents. Vent the liberated carbon dioxide and then shake the mixture thoroughly with frequent venting of the funnel. Repeat the process with another 10 mL of bicarbonate solution. Allow the layer to separate completely, then draw off the lower layer into a 50 mL flask (flask 1). Correct positions for holding a separatory funnel when shaking. FIG. 3
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